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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CrossThreadHolder_h | 5 #ifndef CrossThreadHolder_h |
6 #define CrossThreadHolder_h | 6 #define CrossThreadHolder_h |
7 | 7 |
8 #include "core/dom/ActiveDOMObject.h" | 8 #include "core/dom/ActiveDOMObject.h" |
9 #include "core/dom/CrossThreadTask.h" | 9 #include "core/dom/CrossThreadTask.h" |
10 #include "core/dom/ExecutionContext.h" | 10 #include "core/dom/ExecutionContext.h" |
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46 // destructed (possibly on the calling thread or on the thread of | 46 // destructed (possibly on the calling thread or on the thread of |
47 // |executionContext|) when |executionContext| is stopped or | 47 // |executionContext|) when |executionContext| is stopped or |
48 // CrossThreadHolder is destructed. | 48 // CrossThreadHolder is destructed. |
49 void postTask(PassOwnPtr<WTF::Function<void(T*, ExecutionContext*), WTF::Cro
ssThreadAffinity>> task) | 49 void postTask(PassOwnPtr<WTF::Function<void(T*, ExecutionContext*), WTF::Cro
ssThreadAffinity>> task) |
50 { | 50 { |
51 MutexLocker locker(m_mutex->mutex()); | 51 MutexLocker locker(m_mutex->mutex()); |
52 if (!m_bridge) { | 52 if (!m_bridge) { |
53 // The bridge has already disappeared. | 53 // The bridge has already disappeared. |
54 return; | 54 return; |
55 } | 55 } |
56 m_bridge->executionContext()->postTask(BLINK_FROM_HERE, createCrossThrea
dTask(&Bridge::runTask, m_bridge.get(), task)); | 56 m_bridge->getExecutionContext()->postTask(BLINK_FROM_HERE, createCrossTh
readTask(&Bridge::runTask, m_bridge.get(), task)); |
57 } | 57 } |
58 | 58 |
59 ~CrossThreadHolder() | 59 ~CrossThreadHolder() |
60 { | 60 { |
61 MutexLocker locker(m_mutex->mutex()); | 61 MutexLocker locker(m_mutex->mutex()); |
62 clearInternal(); | 62 clearInternal(); |
63 } | 63 } |
64 | 64 |
65 private: | 65 private: |
66 // Object graph: | 66 // Object graph: |
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114 // can be called on any thread. | 114 // can be called on any thread. |
115 void clearInternal() | 115 void clearInternal() |
116 { | 116 { |
117 // We don't clear |m_obj| here to destruct |m_obj| on the thread | 117 // We don't clear |m_obj| here to destruct |m_obj| on the thread |
118 // of |executionContext|. | 118 // of |executionContext|. |
119 m_holder = nullptr; | 119 m_holder = nullptr; |
120 } | 120 } |
121 | 121 |
122 void runTask(PassOwnPtr<WTF::Function<void(T*, ExecutionContext*), WTF::
CrossThreadAffinity>> task) | 122 void runTask(PassOwnPtr<WTF::Function<void(T*, ExecutionContext*), WTF::
CrossThreadAffinity>> task) |
123 { | 123 { |
124 ASSERT(executionContext()->isContextThread()); | 124 ASSERT(getExecutionContext()->isContextThread()); |
125 if (m_obj) | 125 if (m_obj) |
126 (*task)(m_obj.get(), executionContext()); | 126 (*task)(m_obj.get(), getExecutionContext()); |
127 } | 127 } |
128 | 128 |
129 private: | 129 private: |
130 // ActiveDOMObject | 130 // ActiveDOMObject |
131 void stop() override | 131 void stop() override |
132 { | 132 { |
133 ASSERT(executionContext()->isContextThread()); | 133 ASSERT(getExecutionContext()->isContextThread()); |
134 { | 134 { |
135 MutexLocker locker(m_mutex->mutex()); | 135 MutexLocker locker(m_mutex->mutex()); |
136 if (m_holder) | 136 if (m_holder) |
137 m_holder->clearInternal(); | 137 m_holder->clearInternal(); |
138 ASSERT(!m_holder); | 138 ASSERT(!m_holder); |
139 } | 139 } |
140 | 140 |
141 // We have to destruct |*m_obj| here because destructing |*m_obj| | 141 // We have to destruct |*m_obj| here because destructing |*m_obj| |
142 // in ~Bridge() might be too late when |executionContext| is | 142 // in ~Bridge() might be too late when |executionContext| is |
143 // stopped. | 143 // stopped. |
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168 RefPtr<MutexWrapper> m_mutex; | 168 RefPtr<MutexWrapper> m_mutex; |
169 // |m_bridge| is protected by |m_mutex|. | 169 // |m_bridge| is protected by |m_mutex|. |
170 // |m_bridge| is cleared before the thread that allocated |*m_bridge| | 170 // |m_bridge| is cleared before the thread that allocated |*m_bridge| |
171 // is stopped. | 171 // is stopped. |
172 CrossThreadPersistent<Bridge> m_bridge; | 172 CrossThreadPersistent<Bridge> m_bridge; |
173 }; | 173 }; |
174 | 174 |
175 } // namespace blink | 175 } // namespace blink |
176 | 176 |
177 #endif // CrossThreadHolder_h | 177 #endif // CrossThreadHolder_h |
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